package com.jiajia.server.config.security;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Component;

import java.util.Collection;

/**
 * 权限判断
 * 根据用户判断角色
 * @author ZSJia
 * @date 2021/8/12 012 - 12:04
 */
@Component
public class CustomUrlDecisionManager implements AccessDecisionManager{
    @Override
    public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> collection) throws AccessDeniedException, InsufficientAuthenticationException {
        for (ConfigAttribute configAttribute : collection) {
            //当前url所需的角色
            String needRole = configAttribute.getAttribute();
            System.out.println("当前所需角色为："+needRole);
            //判断角色是否为登录即可访问的角色 此角色在CustomFilter中设置
            if ("ROLE_LOGIN".equals(needRole)){
            if (authentication instanceof AnonymousAuthenticationToken){
            throw  new AccessDeniedException("尚未登录，请登录");
            }else {
                return;
            }
            }
            //判断用户角色是否是url所需角色
            Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
            for (GrantedAuthority authority : authorities) {
                if (authority.getAuthority().equals(needRole)){
                    return;
                }
            }

            throw new AccessDeniedException("权限不足");
        }
    }

    @Override
    public boolean supports(ConfigAttribute configAttribute) {
        return false;
    }

    @Override
    public boolean supports(Class<?> aClass) {
        return false;
    }
}
